QS世界大學排名中，中國在前20強中有哪些專業？
2022QS世界大學學科排名里，中國大陸共有93所高校上榜，數量排名全球第三，僅次于英國（105所）和美國（227所），其中10所高校為首次上榜。多年來，中國大陸上榜院校數量穩步上升：2018年上榜高校數量為74所。 在...
Edexcel IGCSE Chemistry 復習筆記 1.9.1 Explaining Conductivity
Edexcel IGCSE Chemistry 復習筆記 1.9.1 Explaining Conductivity Conductivity of Covalent Compounds Electric current is the flow of?charged particles This usually refers to electrons, but it c...
AQA A Level Physics復習筆記8.2.1 Radioactive Decay
Radioactive Decay Radioactive decay is defined as: The spontaneous disintegration of a nucleus to form a more stable nucleus, resulting in the emission of an alpha, beta or gamma particle Ra...
Edexcel IGCSE Chemistry 復習筆記 1.8.1 Metallic Bonding
Edexcel IGCSE Chemistry 復習筆記 1.8.1 Metallic Bonding Metallic Bonding Metal atoms are held together strongly by metallic bonding Within the?metal lattice, the atoms lose their valence ele...
AQA A Level Physics復習筆記8.1.7 Required Practical: Inverse Square-Law for Gamma Radiation
Required Practical: Inverse Square-Law for Gamma Radiation Aim of the Experiment The aim of this experiment is to verify the inverse square law for gamma radiation of a known gamma-emitting ...
AQA A Level Physics復習筆記8.1.6 Radiation Safety
Safe Handling of Radioactive Sources It is very well known that radioactive sources are dangerous if handled improperly When choosing a source to work with, the following characteristics are...
Edexcel IGCSE Chemistry 復習筆記 1.7.4 Giant Covalent Structures
Edexcel IGCSE Chemistry 復習筆記 1.7.4 Giant Covalent Structures Giant Covalent Structures Covalent bonding can be responsible for substances that have many different structures and therefor...
AQA A Level Physics復習筆記8.1.5 Background Radiation
Background Radiation Background radiation describes the low level of radiation present in the surroundings at all times There are two types of sources of background radiation: Natural source...
AQA A Level Physics復習筆記8.1.4 Inverse-Square Law of Gamma Radiation
Inverse-Square Law of Gamma Radiation As an electromagnetic wave, gamma radiation shares many of the same wave properties as light Light sources which are further away appear fainter because...
